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Anogenital warts and HPV
Anogenital warts (condyloma acuminata) are mainly caused by low-risk HPV types 6 and 11, while high-risk types — mainly 16 and 18 — cause precancerous lesions and cancer of the cervix, anus, penis and oropharynx; the vaccine prevents both.
Why it matters in the exam
The exam shows a young man with skin-coloured cauliflower-like papules on the penis or around the anus, and asks for the right treatment: self-applied (imiquimod, podophyllotoxin, sinecatechins) or clinic-based (cryotherapy, trichloroacetic acid, excision, laser). The question also tests pregnancy — podophyllotoxin must not be used and imiquimod is not recommended — the link between laryngeal warts in children and vaginal delivery (recurrent respiratory papillomatosis), and when to biopsy: a pigmented, fixed, ulcerated or bleeding lesion, failure to respond, and immunosuppression. Remember that the warts themselves do not turn into cancer, but their presence signals HPV exposure, and that the nine-valent vaccine is given in Israeli schools to boys and girls and is recommended until age 26 and sometimes later. Genital warts in a young child raise suspicion of abuse, though transmission at birth or by non-sexual contact is also possible. It is important to explain to the patient that the infection is very common, that the immune system usually clears it, and that condoms reduce transmission but do not fully prevent it.
Key points
- Anogenital warts are mainly caused by HPV types 6 and 11 and do not themselves turn into cancer.
- HPV types 16 and 18 cause precancerous lesions and cancer of the cervix, anus, penis and oropharynx.
- Treatment includes self-applied imiquimod, podophyllotoxin or sinecatechins, or clinic-based cryotherapy, TCA, excision or laser.
- In pregnancy podophyllotoxin must not be used; cryotherapy and TCA are safe.
- The nine-valent vaccine prevents warts and cancer, and is given in Israel to boys and girls at school.
Summary table
| Aspect | Finding | Meaning | Action |
|---|---|---|---|
| Types | 6 and 11 — warts; 16 and 18 — precancer and cancer | Warts themselves do not become cancer | Cervical screening per programme; vaccination |
| Self-applied treatment | Imiquimod 5%, podophyllotoxin, sinecatechins | Convenient, at home, weeks to months | No podophyllotoxin in pregnancy |
| Clinic treatment | Cryotherapy, trichloroacetic acid, excision, laser | Faster; TCA allowed in pregnancy | Choose by number, size and site |
| Biopsy | Pigmented, fixed, ulcerated, bleeding or resistant lesion, or immunosuppression | Exclude a precancerous lesion (AIN, PIN, VIN) | Do it before destructive treatment |
| Pregnancy and children | Warts grow in pregnancy; laryngeal warts in children | Recurrent respiratory papillomatosis | Caesarean section only if the birth canal is obstructed or bleeding risk |
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Sources
- CDC Sexually Transmitted Infections Treatment Guidelines, 2021 — Anogenital warts
- European guideline for the management of anogenital warts (IUSTI), 2020 — Treatment
- Israeli Ministry of Health HPV vaccination programme, 2024 — School-age vaccination
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-06. The text may contain errors; when in doubt, check the source.